tdf#159938: only apply wrap when the content was modified

Change-Id: I2f18739239401085a06bbdce6623a484c13d680b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/164091
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
diff --git a/sc/source/ui/app/inputhdl.cxx b/sc/source/ui/app/inputhdl.cxx
index 6be4ea7..8d5f04b 100644
--- a/sc/source/ui/app/inputhdl.cxx
+++ b/sc/source/ui/app/inputhdl.cxx
@@ -3137,7 +3137,7 @@ void ScInputHandler::EnterHandler( ScEnterMode nBlockMode, bool bBeforeSavingInL
    lcl_RemoveTabs(aString);
    lcl_RemoveTabs(aPreAutoCorrectString);

    if (aString.indexOf('\n') != -1)
    if (bModified && aString.indexOf('\n') != -1)
    {
        // Cell contains line breaks, enable wrapping
        ScLineBreakCell aBreakItem(true);